P0171 and P0174 | Page 2 | Ford Explorer Forums

  • Register Today It's free!

P0171 and P0174

Okay changed the plugs, PCV valve, fuel and air filters, cleaned the MAF, no change.
 



Join the Elite Explorers for $20 each year or try it out for $5 a month.

Elite Explorer members see no advertisements, no banner ads, no double underlined links,.
Add an avatar, upload photo attachments, and more!
.











Okay cleaned MAF, new plugs, new PCV valve, new air and fuel filters, no change. What about resetting my fuel trims and relearning the PCM?
 


















...went through the same process you did on my '98 SOHC. PCV, EGR, check/replace/repair hoses, etc. Until..

Upper and lower intake manifold gaskets.
Upper and lower INTAKE MANIFOLD GASKETS.
UPPER AND LOWER INTAKE MANIFOLD GASKETS!!
UPPER AND...well, you get the idea.

Problem solved. Takes about an afternoon, no special tools. Take your time and remove/replace everything methodically. RA has Felpro U&L gasket sets for less than $50. There's a writeup somewhere here with pix.
 






Featured Content

Back
Top